Head front shooting device and natural head position correction method of three-dimensional head model
A shooting device and three-dimensional model technology, applied in the field of clinical dental imaging, can solve the problem that the accuracy and repeatability are easily affected by the doctor's subjectivity, the color photos cannot establish accurate correspondence, and the patient's facial skin color information cannot be recorded, etc. problem, to achieve the effect of simple operation and good reference
Active Publication Date: 2014-04-02
FOURTH MILITARY MEDICAL UNIVERSITY
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At present, this method is generally used in the correction of NHP of the 3D head model, but its accuracy and repeatability are easily affected by the subjective effects of doctors.
[0003] In addition, regarding the 3D head model of the patient, most of them need to be obtained through 3D reconstruction after CT scanning. The reconstructed 3D model can accurately reflect the 3D shape of the patient's head, but it cannot record the color information of the patient's facial skin. The color photographs of the
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[0028] The present invention will be further described below in conjunction with accompanying drawing:
[0029] refer to figure 1 , is a schematic diagram of the front view of the head frontal photographing device of the present invention; refer to figure 2 , is a schematic top view of the head frontal photographing device of the present invention. The head frontal photographing device mainly utilizes the camera 14 to photograph the front of the human head. For example, camera 14 employs a 100mm fixed focus lens. In this head frontal shooting device, be provided with tripod 13, tripod 13 has adjustable telescopic foot, and its top has spherical cloud platform, can be used for fixing camera obscura 1. refer to image 3 , is a schematic diagram of the internal structure of the dark box of the present invention; refer to Figure 4 , is a schematic diagram of the one-way perspective glass of the present invention. The obscura 1 is in the shape of a cuboid, wherein five side...
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The invention belongs to the field of iconography in oral clinical medicine and discloses a head front shooting device and a natural head position correction method of a three-dimensional head model. The head front shooting device comprises a plumb line, a tripod, at least one flashlight, a camera bellows and a camera, wherein the camera bellows is fixedly arranged on a spherical PTZ (Pan / Tilt / Zoom) of the tripod, and the camera is fixedly arranged inside the camera bellows; unidirectional perspective glass is mounted on the camera bellows, the back face of the unidirectional perspective glass faces to a lens of the camera, and the front face of the unidirectional perspective glass faces to the plumb line; each flashlight faces towards the front of the camera; a flashlight flash trigger is mounted on the camera; the camera is electrically connected with a computer.
Description
technical field [0001] The invention belongs to the field of oral clinical medical imaging, and relates to a head frontal photographing device and a method for correcting a natural head position of a three-dimensional head model. Background technique [0002] Natural head position (NHP) is currently recognized as the best reference for evaluating facial appearance. Natural head position refers to a repeatable physiological position of the head when a person is in a relaxed state, the head is upright, and the eyes are gazing at a certain point at eye level, which reflects the real situation of the individual in life. Studies have shown that compared with other reference planes, the natural head position is highly repeatable. Therefore, the natural head position is important when analyzing the facial appearance of patients, diagnosing facial deformities, determining treatment options and evaluating treatment effects. reference base. There are two ways to obtain NHP: the firs...
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Inventor 白石柱董瑜高蕊贾骏郭秋云
Owner FOURTH MILITARY MEDICAL UNIVERSITY